Carrier Furnace Inducer Motor Fault

Leak in tubing defective pressure switch restricted vent bad inducer motor rule out motor it works if the tube off the induced draft blower housing are plugged it will cause this trip.

Carrier furnace inducer motor fault.

Status code 42 inducer motor fault step action go to does the voltage fluctuate as described in step 28. From the carrier 58mvp service manual. Usually found where the cold air enters the unit either in the cold air return duct or the entrance to the blower chamber. This is always helpful to pinpoint the problem to the inducer motor in the first place.

Fault code 11 means the inducer motor is functioning properly. Draft inducer motor failure. Fault code 42 means inducer outside valid speed range this indicates that 10 seconds have elapsed and the inducer motor has not started or the inducer motor has started but is not operating at expected r p m. Part number part description part link 20054001 carrier 20054001 draft inducer motor assembly view carrier part 20054001 2272065 carrier 2272065 draft inducer motor assembly view carrier part 2272065 2272158 carrier 2272158 draft inducer motor assembly view carrier part 2272158 308088 751 carrier 308088 751 draft inducer housing view carrier part 308088 751 308118 405 carrier.

Locate the current filter. One common issue with any blower motor in hvac systems is a bad capacitor. Take out the old air filter and replace it with a new one. Your furnace may also give you fault codes related to draft inducer blowers.

These tubes are the small one coming off the firebox and motor housing going to a drain. Bad capacitor causing motor not to start up. Thirty seconds after being turned on or ten. Blower motor fault indicates the blower failed to reach 250 rpm or the blower failed to communicate within the prescribed time limits.

Reconnect pl3 to the variable speed furnace control and connect a dc voltmeter across terminals pl3 4 blue and pl3 2 green.